86 results about "Electrode adhesive" patented technology

The invention discloses a water-based lithium battery positive electrode adhesive, a preparation method and application. The adhesive is of a single-layer or multi-layer shell core-shell structure formed by polar monomers such as acrylic acid, acrylate monomers, cross-linking monomers, self-emulsifying monomers and water through core-shell emulsion polymerization; by controlling the mass percent of acrylate monomers, polar groups and the like in the core layer structure and the shell layer structure and selecting proper types and dosages of cross-linking monomers and self-emulsifying monomers, the adhesive has proper surface tension, shows excellent adhesion and wettability to the current collector, has high peel strength, and is suitable for the current collector. According to the present invention, the lithium ion battery pole piece has the low glass-transition temperature so as to ensure the high toughness, the high surface density, the excellent electrolyte resistance, the excellent electrical property, the excellent coating property and the like of the pole piece, and the raw materials are all non-fluorine materials so as not to produce hydrogen fluoride and other harmful gases during the lithium battery recovery; water is used as a solvent, recycling is not needed, environment friendliness and low carbon are achieved, the manufacturing process is simplified, and the application range is widened.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a self-repairing type lithium ion battery positive electrode adhesive, a preparation method, positive electrode slurry and a positive electrode plate. The adhesive comprises a mixed solvent, and a first copolymer serving as a main component and a second copolymer serving as a cross-linking agent are dissolved in the mixed solvent; the first copolymer is an acrylate-based multipolymer containing carboxyl or hydroxyl; the second copolymer is isocyanate terminated UPy functional polyurethane; the adhesive is in a liquid state at room temperature, when the adhesive is subjected to vacuum heat treatment at 60-180 DEG C, carboxyl or hydroxyl in main components of the adhesive reacts with isocyanate groups of a cross-linking agent to form amido bonds along with volatilization of a mixed solvent, and UPy groups are associated through quadruple hydrogen bonds to form dual dynamic cross-linking points. The method can effectively adapt to the volume change of the positive electrode material in the lithium removal / insertion process, and maintains the integrity of the electrode structure, thereby improving the cycling stability and rate capability of the lithium ion battery.

The invention provides waterborne polyurethane resin and a porphyrin-based lithium-sulfur battery electrode binder prepared from the waterborne polyurethane resin, and particularly relates to high-molecular waterborne polyurethane resin with carboxyl in a molecular chain and a preparation method of the high-molecular waterborne polyurethane resin. The preparation method comprises the following steps: carrying out condensation polymerization reaction on 2, 2-dimethylolpropionic acid, N-methyldiethanolamine and diisocyanate which are used as raw materials to prepare an isocyanate-terminated prepolymer solution, and then sequentially carrying out salifying carboxyl neutralization, emulsification and chain extension to prepare the polyurethane prepolymer. The invention discloses a water-based binder for a lithium-sulfur battery electrode, which is prepared by in-situ crosslinking of the water-based polyurethane resin and porphyrin / metalloporphyrin and has electrocatalytic performance, and a preparation method of a sulfur electrode based on the water-based binder for the lithium-sulfur battery electrode. Compared with a commercial electrode binder, the aqueous binder for the lithium-sulfur battery electrode has higher initial discharge capacity, higher capacity retention ratio and lower charge-discharge voltage polarization, and a brand new thought and scheme are provided for developing a high-performance lithium-sulfur battery.

The invention relates to an electrode adhesive as well as a preparation method and application thereof. The electrode adhesive comprises a water-soluble high-molecular polymer and an amino-containing polymer, the water-soluble high-molecular polymer is obtained by sequentially carrying out polymerization reaction and alcoholysis reaction on monomers; the monomers comprise a type I monomer, a type II monomer and a type III monomer; the monomer I comprises vinyl acetate and / or vinyl propionate; the monomer II comprises methacrylate containing short-chain alkane and / or acrylate containing short-chain alkane; and the III type monomer contains cyano groups. The electrode adhesive provided by the invention has good adhesive property, flexibility and temperature stability, is resistant to electrolyte swelling, and is suitable for an electrode material of a lithium ion battery.

The embodiment of the present application provides a positive electrode material, a secondary battery and an electric device, wherein the positive electrode material comprises a core and a coating layer arranged on the surface of the core, the core comprises a sodium ion layered oxide, and the coating layer comprises a spinel lithium salt. In the embodiment of the present application, the layered positive electrode material is tightly coated by the spinel lithium salt, so that the problem that the interface impedance of the positive electrode material of the existing sodium ion battery is large and the positive electrode adhesive is easily attacked is solved.

The invention relates to the technical field of secondary batteries, and discloses a secondary battery, a negative active layer in a negative plate comprises a negative active material and a negative adhesive, the negative active material comprises a silicon-based material, the negative adhesive comprises a polymer, and the raw material of the polymer comprises a hard segment monomer and a soft segment monomer; the electrolyte comprises carbonic ester substances and lithium salt; on the basis of the total mass of the raw materials of the polymer, the mass content of the soft segment monomer is r%; on the basis of the total mass of the electrolyte, the mass content of the carbonic ester substance is t%; t / r is greater than or equal to 0.234 and less than or equal to 1.770. According to the secondary battery provided by the invention, the chemical structure of the adhesive is optimized and the composition of the electrolyte solution is adjusted, so that the excellent electrochemical performance of the battery is ensured, the swelling effect of the electrolyte on the adhesive is reduced, the cycle life of the battery is prolonged, and the safety of the battery is improved.

The invention provides a negative electrode binder composition, a negative electrode plate and a secondary battery, aiming at the problem that an existing negative electrode binder cannot effectively inhibit volume expansion of a silicon negative electrode. The negative electrode binder composition comprises a polysaccharide compound, a compound containing a linear rigid chain and metal cations complexed with the polysaccharide compound, and the mass ratio of the polysaccharide compound to the compound containing the linear rigid chain to the metal cations is (0.5-10): (10-40): (0.02-0.5); the polysaccharide compound and the compound containing the linear rigid chain both contain carboxyl groups, the pH value of the negative electrode binder composition is 5-8, and at least parts of the carboxyl groups in the polysaccharide compound and the carboxyl groups in the compound containing the linear rigid chain are complexed with metal cations. According to the negative electrode binder composition provided by the invention, the polysaccharide compound and the compound containing the linear rigid chain form a self-recovery network structure, so that crushing of negative electrode material particles is effectively prevented, and a material interface is stabilized.

The invention discloses a sulfonyl-containing high-voltage-resistant positive electrode adhesive, a preparation method thereof, a battery positive electrode and a lithium ion battery, and belongs to the technical field of lithium batteries. The adhesive is a random copolymer of an acrylonitrile monomer, a sulfonyl-containing monomer and poly (ethylene glycol) methyl ether methacrylate, the sulfonyl-containing monomer has excellent oxidation resistance, can assist in forming CEI rich in inorganic components, and is beneficial to maintaining the structural stability and electrochemical stability of the CEI in the cyclic process; acrylonitrile can improve the adhesion and stabilize the surface structure of the positive electrode active material; by adding poly (ethylene glycol) methyl ether methacrylate, the flexibility of the polymer can be improved, and stress generated by volume change in the long-term charging and discharging process can be buffered. The sulfonyl-containing high-voltage-resistant positive electrode functional adhesive can effectively regulate and control CEI components, inhibits interface side reactions, and effectively improves the cycling stability of a high-voltage positive electrode battery.

The utility model provides a roll core structure and a secondary battery. The roll core structure comprises a positive plate, a first diaphragm, a negative plate and a second diaphragm which are stacked and wound, and a first straight area, a first R-angle area, a second straight area and a second R-angle area which are sequentially connected end to end are formed on the roll core structure; the positive plate comprises a positive head part, a double-sided paste-coated foil part, a single-sided paste-coated foil part and a positive tail part which are sequentially connected along the winding direction, and the positive tail part is positioned on the outer side of the tail part of the negative plate; the connection junction of the double-sided paste-coated foil part and the single-sided paste-coated foil part is a first connection junction, the first connection junction is located in the first R angle area, and the first positive electrode adhesive layer is attached to the outer side of the part, close to the first connection junction, of the single-sided paste-coated foil part.

The invention relates to a battery negative electrode adhesive distribution detection device and method and a storage medium, in the device, a supporting frame and a reaction substance are arranged in a reaction container, the supporting surface of the supporting frame and the reaction substance are arranged at an interval, and the supporting surface supports a negative electrode plate to be detected; the temperature adjusting equipment is used for adjusting the temperature of the reaction substance, so that the reaction substance reacts with the adhesive in the negative plate to be detected, and a reaction pole plate is obtained; cutting the reaction pole piece by cutting equipment to obtain a pole piece cutting surface; the scanning equipment scans the cutting surface of the pole piece based on the tracer element to obtain scanning data, and determines an adhesive distribution result of the to-be-detected negative pole piece according to the scanning data, so as to characterize the distribution of the adhesive in the battery negative pole piece. Therefore, non-uniform reaction or complete reaction between the substrate and the reaction substance caused by direct contact between the reaction substance and the to-be-detected negative plate is avoided, the reaction uniformity is improved, the original structure of the to-be-detected negative plate is ensured not to be damaged, and the accuracy of the detection result is improved.

The invention provides an electrode binder and a preparation method and application thereof.The electrode binder comprises a water-soluble high-molecular polymer and a solvent, the water-soluble high-molecular polymer is obtained after monomers are subjected to a polymerization reaction and an alcoholysis reaction, and the monomers comprise a first monomer, a second monomer and a third monomer; the first monomer comprises a vinyl ester monomer, the second monomer comprises a short-chain alkyl acrylate monomer of which the carbon atom number is less than or equal to 10, and the third monomer comprises a cyclic acrylate monomer; by selecting the three specific monomers for matching, the side chain of the obtained water-soluble high-molecular polymer contains an annular structure and rich hydroxyl and carboxyl, so that the electrode adhesive has good dispersing performance and adhesive performance on an electrode active material, and is relatively high in flexibility and temperature stability; meanwhile, the electrolyte swelling resistance is good, and the material is suitable for an electrode material of a lithium ion battery.

The invention discloses a preparation method of PTFE for a dry-method electrode adhesive, and relates to the technical field of battery materials. The method comprises the following specific steps: adding deionized water into a reaction kettle, and heating a jacket of the reaction kettle; adding an initiator, a surfactant and a chain transfer agent, and uniformly stirring; adding a tetrafluoroethylene monomer, carrying out emulsion polymerization reaction, and controlling the reaction temperature and pressure; after the reaction is finished, cooling and filtering to obtain PTFE emulsion, and drying the PTFE emulsion to obtain PTFE powder; and coating conductive carbon powder on the surface of the PTFE powder for passivation modification to obtain the PTFE for the dry-method electrode adhesive. The dry-method electrode has higher tensile strength and conductivity, and can better meet the requirements of the dry-method electrode.

The utility model provides a rubberizing mechanism and rubberizing device.The rubberizing mechanism comprises a rack, a transplanting assembly and an adsorption assembly, the transplanting assembly comprises a lifting module, the adsorption assembly comprises a first adsorption structure, a second adsorption structure and a driving structure, and the lifting module is in driving connection with the first adsorption structure and a first driving part; the first adsorption structure adsorbs the part, corresponding to the top surface of the battery cell, of the adhesive tape, the second adsorption structures are arranged on the two sides of the first adsorption structure in pairs, the second adsorption structures adsorb the parts, corresponding to the large surfaces of the two sides of the battery cell, of the adhesive tape, and the second driving part is in driving connection with the two second adsorption structures arranged in pairs; and the second driving part drives the two second adsorption structures to get close to each other or get away from each other. According to the application, the cooperative work of the first adsorption structures and the second adsorption structures is adopted, so that the adhesive tape bonding efficiency is improved; therefore, the problem that the battery cell packaging efficiency is affected due to poor applicability of the rubberizing mechanism of the pole piece in the prior art can be solved.

An electrode tape inspection device of the present invention is an electrode tape inspection device for continuously inspecting dimensions of an electrode and a tape attached to the electrode during an electrode taping process, and detecting foreign substances present on the electrode and the tape. The electrode tape inspection device comprises: a photographing unit provided to photograph the electrode and the tape attached to the electrode; a dimension measurement light unit provided to illuminate the tape to measure dimensions of the tape and the electrode; and a foreign substance detection light unit provided to illuminate the tape to detect foreign substances present on the tape and the electrode.

The invention discloses a preparation method of a lithium ion battery negative electrode, and relates to the technical field of lithium batteries, and the preparation method comprises the following steps: S1, taking a self-assembled carbon nanotube and a carbonized polyimide film, mixing and grinding to obtain an active substance; s2, mixing and grinding an active substance and acetylene black to obtain electrode powder; s3, polyvinylidene fluoride is dissolved in N-methyl pyrrolidone, and an electrode adhesive is obtained; s4, uniformly mixing the electrode powder and an electrode adhesive to obtain electrode slurry; and S5, coating the surface of a copper foil with the electrode slurry, and drying to obtain the lithium ion battery negative electrode. The self-assembled carbon nanotubes and the carbonized polyimide film are mixed and ground to obtain an active substance, acetylene black is supplemented to prepare the electrode powder, and the N-methyl pyrrolidone solution of polyvinylidene fluoride is used as an electrode binder, so that the prepared lithium ion battery negative electrode can effectively improve the capacity and cycling stability of the lithium ion battery.

The present application relates to the technical field of lithium batteries, and specifically discloses a lithium battery negative electrode binder. The binder raw materials include 2-amino-1,1,3-tricyano-1-propylene monomers and 2,4,5-trimethoxy-1-propylene monomers. The binder includes a polymer of the 2-amino-1,1,3-tricyano-1-propylene and the 2,4,5-trimethoxy-1-propylene. Due to the presence of polycyano, polymethoxyphenyl and oxidized amino groups, the binder has a certain steric hindrance between polymer chains, is not easy to entangle, and the cyano group has a strong electron-withdrawing ability, attracting groups such as methoxy and methyl. The influence of steric hindrance and electron-withdrawing effect keeps a certain distance between the polymer chains, and can maintain structural stability in the high and low temperature switching process, has a small expansion coefficient, and is resistant to cold and hot shocks. The binder can maintain good toughness and structural stability, is resistant to cold and hot shocks, and has a good affinity for graphite, is conducive to the transfer of charge, and helps to maintain the cycle performance of the lithium battery.

The invention relates to the technical field of lithium ion batteries, and particularly provides a gradient copolymer, a preparation method and application thereof, an adhesive, a negative pole piece and a lithium ion battery. The gradient copolymer provided by the invention comprises a repeating unit A generated by polymerization of at least one monomer A, a homopolymer corresponding to the monomer A has a glass transition temperature Tg1 of not less than 100 DEG C, and the number-average molecular weight of the homopolymer corresponding to the monomer A is 100,000-500,000; a repeating unit B resulting from the polymerization of at least one monomer B, the corresponding homopolymer of the monomer B exhibiting a glass transition temperature Tg2 of not more than 80 DEG C, and the number average molecular weight of the corresponding homopolymer of the monomer B being 100,000-500,000; the repeating unit A and the repeating unit B are connected through a carbon-carbon single bond. When the gradient copolymer disclosed by the invention is used as a negative electrode adhesive, the volume expansion stress release of graphite in the circulation process is more relaxed and progressive, and the cycle performance of a battery cell can be better improved.

The present invention discloses a negative electrode binder and a negative electrode sheet, a preparation method and a battery, wherein the negative electrode binder is an SBR-M binder emulsion containing both SBR and M elements, wherein M is Na or Li, and the pH of the negative electrode binder is 7.0 to 9.0. The negative electrode binder of the present invention can not only effectively improve the first efficiency of the battery, reduce the loss of active sodium / lithium, thereby improving the battery capacity and energy density, but also improve the negative electrode sheet peeling force, capture the free acid in the electrolyte, thereby improving the cycle life.

A tetrafluoroethylene-based polymer composition for use as an adhesive in electrochemical devices is provided, which can reduce the resistance of electrochemical devices and also provide adhesive sheets with excellent adhesion to substrates. This is further explained by the use of the same composition in adhesives, electrode adhesives, electrodes, and secondary batteries for electrochemical devices. Specifically, a tetrafluoroethylene-based polymer composition for use as an adhesive in electrochemical devices is provided, wherein the tetrafluoroethylene-based polymer composition has polar groups, the content of which is less than 0.020 meq / g relative to the tetrafluoroethylene-based polymer composition, the tetrafluoroethylene-based polymer composition is non-melt processable, and the apparent density is less than 0.50 g / ml.

A parameter configuration method in a disposable electrocardio-electrode glue-to-glue alternating current impedance test comprises the following steps: (1) selecting a voltage source with an adjustable sine excitation amplitude, preparing a reference resistor R0 with an adjustable resistance value, and preparing a glue-to-glue disposable electrocardio-electrode pair as a test object; (2) connecting the selected and prepared adjustable voltage source, a reference resistor R0 and an electrode pair to be tested in series to form a test circuit; (3) repeatedly testing the alternating current impedance spectrum of the to-be-tested electrode pair for multiple times according to the pairing of one amplitude of sine excitation of the given voltage source and one resistance value of the reference resistor R0, and calculating a repeatability index; (4) changing pairs of the sine excitation amplitude of enough voltage sources and the resistance value of the reference resistor R0, repeatedly testing the alternating-current impedance spectrum of the electrode pair for multiple times under each pair, and calculating a repeatability index value of the alternating-current impedance spectrum; and (5) comparing the repeatability index values to obtain optimal pairing.

The present invention provides a separator for an electrochemical device and an electrochemical device comprising same, wherein lifespan characteristics are improved by obtaining adhesion between the separator and an electrode, a low-resistance electrode adhesive layer is achieved, and electrolyte wettability can be improved. The separator for an electrochemical device according to an embodiment of the present invention comprises: an olefin polymer porous support; an inorganic hybrid porous layer formed on at least one surface of the olefin polymer porous support; and an electrode adhesive layer formed on one surface of the inorganic hybrid porous layer, the one surface of the inorganic hybrid porous layer not being in contact with the olefin polymer porous support, wherein the electrode adhesive layer includes at least one adhesive portion and at least one uncoated portion on which the adhesive portion is not formed, the total coverage of the adhesive portion is 20-60% of the total area of the inorganic hybrid porous layer, and the minor axis length of the adhesive portion is at most twice the thickness of the separator.

This invention relates to the field of lithium battery negative electrode adhesive preparation technology, specifically to a method for preparing aminosulfonated cellulose salt and its application as a lithium battery negative electrode adhesive. The preparation method includes the following steps: S1, adding sodium carboxymethyl cellulose to an ethanol-water solution and reacting with sulfuric acid to obtain a first product; S2, adding the first product to an ethanol-water solution containing modified nano-calcium carbonate and adding sodium aminosulfonate dropwise to obtain a reaction solution; S3, adding sulfuric acid dropwise to the reaction solution to obtain a second product; S4, adding the second product to an ethanol-water solution and reacting with an alkaline solution to obtain a third product; S5, drying and pulverizing the third product to obtain aminosulfonated cellulose salt. The aminosulfonated cellulose salt prepared by this invention, when applied to the adhesive of the lithium battery negative electrode, can effectively improve the overall flexibility of the material and extend the battery's lifespan.

The invention discloses a solution type negative electrode adhesive as well as a preparation method and application thereof. The preparation method of the adhesive comprises the following steps: a, mixing and stirring polyacrylonitrile fibers and a modifier in water, and treating to obtain a pretreatment solution; b, uniformly dispersing the pretreatment liquid obtained in the step a by using a high-pressure homogenizer to obtain polyacrylonitrile fiber dispersion liquid; c, mixing and reacting the polyacrylonitrile fiber dispersion liquid, unsaturated monomers and an initiator to generate a polymer, and taking out a precipitate; and d, adding the polymer precipitate into water, and adding a neutralizer to adjust the pH value so as to prepare the solution type negative electrode adhesive. According to the invention, the PAA adhesive is modified by a special means, so that the embedding and de-embedding efficiency of lithium ions in the silicon-carbon / silicon negative electrode is improved, the surface cracking and powder falling of a pole piece caused by volume expansion of the silicon-carbon / silicon negative electrode in the charging and discharging process are avoided, and the cycling stability and the cycling efficiency of the silicon-carbon / silicon negative electrode are improved.

The present invention relates to a battery negative electrode binder for lithium battery and a preparation method thereof, a battery negative electrode plate and a lithium battery. The battery negative electrode binder comprises: 1-3 parts of multi-walled carbon nanotubes, 10-15 parts of lithium alginate, and 480-520 parts of styrene-butadiene rubber emulsion. Lithium alginate can make the multi-walled carbon nanotubes disperse evenly. When preparing the negative electrode plate, the negative electrode binder dissolves the negative electrode active material and the conductive agent to form a negative electrode material. Since the multi-walled carbon nanotubes enhance the mechanical properties and conductivity of the negative electrode plate, lithium alginate can enhance the bonding properties of the negative electrode plate, and can also ensure that the multi-walled carbon nanotubes are stably dispersed in the negative electrode material and the negative electrode binder, so that the performance of the negative electrode plate is highly uniform. And lithium alginate can supplement lithium to the negative electrode plate. The styrene-butadiene rubber emulsion provides bonding properties for the negative electrode plate, and provides mechanical properties, thermal stability and conductivity for the membrane formed by the negative electrode material. The present invention has low energy consumption and is environmentally friendly without affecting the performance.

The packaging structure comprises a capacitor shell, a rubber cover is arranged at the bottom of the interior of the capacitor shell, an electrode is arranged at the top of the rubber cover, two pins are arranged at the bottom of the rubber cover, a heat dissipation base is arranged at the bottom of the capacitor shell, and the heat dissipation base comprises an installation base arranged at the bottom of the capacitor shell; the second heat dissipation holes are formed in the middle of the mounting base, and the second heat dissipation holes are formed in the mounting base in parallel at equal intervals; the second heat dissipation blocks are arranged in the second heat dissipation holes, heat generated by the electrodes is fully absorbed through the anti-explosion gaskets, the multiple heat dissipation fins are matched, the heat dissipation area is increased, heat dissipation is conducted in the circumferential direction, and the axial heat transfer rate is increased through the first heat dissipation blocks arranged in the first heat dissipation holes and the second heat dissipation blocks arranged in the second heat dissipation holes; and axial heat dissipation is carried out in cooperation with the ventilation slots, so that the heat dissipation effect is improved, the capacity change of the capacitor caused by temperature change is prevented, and the service life is prolonged.

The utility model belongs to the technical field of knurling of fireproof rolling shutter doors, and provides an efficient dispersing negative electrode adhesive preparation device which comprises a mixing preparation cylinder and a main body of the efficient dispersing negative electrode adhesive preparation device, an annular medicine mixing box is arranged on the periphery of the bottom of the mixing preparation cylinder, and a sealing door is hinged to the outer surface of the mixing preparation cylinder. After an adhesive enters the mixing preparation cylinder through the jet flow mixer, the adhesive falls on the impact plate and is dispersed on the screen plate, then the dispersed adhesive can slide down along the multiple flow guide strips, the adhesive passing through the multiple flow guide strips can form a dispersed water curtain, and then after the additive enters through the feeding opening, the water curtain can flow into the jet flow mixer to form a water curtain. The additive is dispersed along with the screen plate and is in contact with the flow guide strips forming the water curtains, so that the adhesive and the additive are in more uniform contact, and the adhesive and the additive need to pass through a plurality of groups of water curtains, so that the contact time of the adhesive and the additive is longer, and the reaction is more comprehensive.

The invention relates to a zinc-iodine battery positive electrode binder, a zinc-iodine battery positive electrode plate based on the binder and a preparation method and application of the zinc-iodine battery positive electrode plate, and belongs to the technical field of battery binder materials. The invention aims to solve the technical problem of serious multi-iodide shuttling of the existing water-based zinc-iodine battery. The preparation method of the zinc-iodine battery positive pole piece based on the binder comprises the following steps: dissolving an active substance, a conductive agent and the binder in water according to a certain proportion, and uniformly mixing to obtain black pasty slurry; and uniformly smearing the black pasty slurry on a current collector, and naturally airing in air to obtain the battery positive pole piece. The sodium lignin sulfonate is used as the positive electrode binder of the aqueous zinc-iodine battery, so that corrosion of polyiodide to a zinc negative electrode is reduced, the service life of the battery is prolonged, and the initial capacity and cycling stability of the battery are improved.

The present invention discloses a flame-retardant lithium battery positive electrode adhesive and a preparation method thereof. The preparation method comprises first using an esterified solvent-friendly chain segment, and then preparing it through reversible addition-fragmentation chain transfer polymerization to obtain a microcapsule adhesive wrapped with a flame retardant. The present invention first uses an esterified solvent-friendly chain segment, and then prepares it through reversible addition-fragmentation chain transfer polymerization to obtain a microcapsule adhesive wrapped with a flame retardant, so that the flame retardant is wrapped in the positive electrode adhesive microcapsule, and at high temperature (>120°C), the trithioester group connecting the solvent-friendly chain segment and the solvent-phobic chain segment will be cracked at high temperature, and the amphiphilicity of the microcapsule will be destroyed, thereby releasing the flame retardant for flame retardancy; at the same time, the trithioester group and its cracked product can be complexed with high-valent metal ions, thereby preventing the reaction between the high-valent metal ions and the electrolyte, and can improve the conventional cycle performance of the battery.

This disclosure relates to a separator. The separator includes an electrode adhesive portion having a high binder content and formed on the surface of the separator to provide increased adhesion to the electrodes and improved processability during battery manufacturing. Therefore, the separator and electrodes are in close contact with each other to prevent gap formation, thereby providing an effect of improved resistive characteristics. In addition, the separator includes an inorganic coating disposed on the surface of a porous substrate, wherein the inorganic coating has a porous structure derived from the interstitial volume between inorganic particles, and thus the separator has appropriate porosity and sufficient electrolyte retention. Furthermore, because the separator includes an inorganic coating on the surface of the porous substrate, the separator ensures heat resistance and prevents shrinkage even when the internal temperature of the battery rises. This disclosure also relates to a method of manufacturing a separator. The method includes forming an inorganic coating and an electrode adhesive portion disposed on the inorganic coating in a single step by using the density of the inorganic particles and the density of the binder resin particles, and therefore has advantages in terms of ease of processing.

The invention relates to a preparation method and application of a phthaloyl gelatin adhesive. Gelatin and phthalic anhydride are subjected to a reaction, such that phthaloyl gelatin is prepared; preparing the obtained phthaloyl gelatin into an adhesive solution, and mixing the adhesive solution with beta-manganese dioxide and conductive carbon to obtain uniform positive electrode slurry; and coating a current collector with the positive electrode slurry to obtain the manganese dioxide positive electrode bonded by the phthaloyl gelatin. According to the invention, the phthaloyl gelatin is used as a positive electrode adhesive; a high-toughness adhesive network of the phthaloyl gelatin can better buffer stress and maintain the structural integrity of the electrode; the free carboxyl group optimizes the electrode-electrolyte wettability, constructs a zinc ion transmission channel, and promotes ion transmission kinetics under high magnification. The bio-based adhesive provides a new strategy for breaking through the stability and rate bottleneck of the zinc ion battery through multi-functional design.